Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 4 / 4
Max The Magnificent
User Rank
Author
re: Three puzzles to ponder
Max The Magnificent   1/13/2011 2:50:17 PM
NO RATINGS
Hi there -- when I said "the first one" I meant the first one posed by KarlS -- in the case of my three, the first one is easy -- as you say the answer is independent of the size of the planet (my specifying the diameter was a "red-herring") -- but you'd be amazed how many folks have difficulty with this one until you explain it (which I don;t want to do here so as to not give the game away)

richardst
User Rank
Author
re: Three puzzles to ponder
richardst   1/13/2011 2:14:03 PM
NO RATINGS
Re: Puzzle 2. As an engineering approximation, assume that the tank has a hexagonal cross-section. Hence, mark 1/6 full 1/4 way up the stick, 1/3 at 3/8, 1/2 at 1/2, 2/3 at 3/8, and 5/6 full at 3/4. That should do for a start. Otherwise, invert the formula for a circlar sector. I like KarlS's first puzzle. Solve t - 1 = t!

Radionut
User Rank
Author
re: Three puzzles to ponder
Radionut   1/13/2011 8:26:52 AM
NO RATINGS
Hello Max, as David states, problem no. 1 is easy: the answer is independent of the size of the planet be it 20km or 20cm or 20 million miles.

Max The Magnificent
User Rank
Author
re: Three puzzles to ponder
Max The Magnificent   1/12/2011 2:59:19 PM
NO RATINGS
Dang, I thought the first one would be easy .. maybe it is but as soon as i start noodling on it some crisis comes up and I get dragged away...

KarlS
User Rank
Author
re: Three puzzles to ponder
KarlS   1/11/2011 8:30:37 PM
NO RATINGS
If one car starts out at 30 mph and a second starts out an hour later at 60 mph, how long before the second car has gone twice as far as the first? (ignore acceleration time). At what times are the hands on a clock pointing in exactly opposite directions?

David Ashton
User Rank
Author
re: Three puzzles to ponder
David Ashton   1/11/2011 8:01:32 AM
NO RATINGS
Right on Glen, I spent far too much of my work day sorting those out......

zeeglen
User Rank
Author
re: Three puzzles to ponder
zeeglen   1/11/2011 2:30:16 AM
NO RATINGS
Assuming a balance beam scale (with counterweights) for puzzle #3 makes the math very easy. Exactly 100 Kg. A strain gauge scale takes some brain sweat with centripetal force calculations. 99.67 Kg ? #2 14.9 cm and 35.1 cm ? Circle segment area geometry, not calculus. Chords and arcs and all that neat stuff long since forgotten. Thank goodness for Wikipedia. Now my head hurts... These are interesting puzzles. Looking forward to more.

David Ashton
User Rank
Author
re: Three puzzles to ponder
David Ashton   1/10/2011 10:13:00 PM
NO RATINGS
Hi Max. Ref problem no. 1. The answer is easy, I won't give it away though, but the main problem that occurs to me is, how are you going to drive the wooden sticks into your stainless steel planet? I think No. 2 requires calculus, which I tried to relearn recently, this would be a good test of my knowledge...

Max The Magnificent
User Rank
Author
re: Three puzzles to ponder
Max The Magnificent   1/10/2011 8:42:25 PM
NO RATINGS
If you've got any good puzzles of this ilk, please email them to me at max@CliveMaxfield.com and I'll use them in a future blog...

<<   <   Page 4 / 4


Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...